/Engine/Plugins/FX/Niagara/Source/Niagara/Public/NiagaraSystemInstance.h
Ticks the system using the a SimCache.
void SimCacheTick_GameThread ( [UNiagaraSimCache](API\Plugins\Niagara\UNiagaraSimCache) * SimCache, float DesiredAge, float DeltaSeconds, const FGraphEventRef & MyCompletionGraphEvent )